{"product_id":"archangel-ls7-cylinder-heads","title":"Archangel LS7 Cylinder Heads","description":"The American Heritage Performance Archangel LS7 Cylinder Heads represent a significant upgrade for LS7 engines, engineered to deliver maximum power for naturally aspirated, boosted, or larger displacement builds (427ci and up). These heads are based on the Brodix BR7 LS7 Cylinder Heads but feature AHP's proprietary CNC porting program, specialized valve guides, and valve seats.\n\nThe Archangel LS7 heads boast a compact 275cc intake runner designed to maintain high intake air velocity, contributing to impressive power and torque across the RPM range. They feature a custom AHP Performance Valve Job with hand blending on the 45-degree intake and exhaust seats for enhanced durability. The heads utilize AHP Moldstar90 valve guides, a material also found in Formula 1 and IndyCar engines.\n\nCustomers can select from various intake and exhaust valve options, including AHP 2.250\" Titanium Molybdenum or Hollow 2.250\" SS intake valves, and Ferrea F2042p 1.615\" lightweight Hollow Stem exhaust valves, Ferrea 1.615\" inconel exhaust valves, or New Late Model GM 1.615\" Lightweight Sodium exhaust valves. A wide range of valve springs are available, including PAC 1207x, PAC 1209x, PSI 1516ml, PSI 1511ml, and stock GM LS7 springs, with specific compatibility notes for Hollow SS Intake Valves and stock camshafts.\n\nThese cylinder heads work with stock 4-bolt GM blocks as well as aftermarket 6-bolt blocks such as LSX, LSR, Dart LS Next, and RHS. They require a minimum bore size of 4.120\" and use gasketed spark plugs. While ideal for performance builds, they can also be bolted onto an otherwise stock LS7 engine and require no tuning in that configuration. Customers can opt for ARP Head Bolts or ARP Head Studs for installation.","brand":"American","offers":[{"title":"Default Title","offer_id":52686892597560,"sku":"AHP-ARCHANGELLS7","price":4845.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/661657849.webp?v=1784878129","url":"https:\/\/store.motormia.co\/products\/archangel-ls7-cylinder-heads","provider":"MOTORMIA","version":"1.0","type":"link"}